US6332797B1 - Waterproof connector - Google Patents

Waterproof connector Download PDF

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Publication number
US6332797B1
US6332797B1 US09/680,504 US68050400A US6332797B1 US 6332797 B1 US6332797 B1 US 6332797B1 US 68050400 A US68050400 A US 68050400A US 6332797 B1 US6332797 B1 US 6332797B1
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United States
Prior art keywords
connector
waterproof
connector housing
seal
seal member
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US09/680,504
Inventor
Naoto Taguchi
Tohru Kurosawa
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Yazaki Corp
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Yazaki Corp
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Filing date
Publication date
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Assigned to YAZAKI CORPORATION reassignment YAZAKI CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KUROSAWA, TOHRU, TAGUCHI, NAOTO
Application granted granted Critical
Publication of US6332797B1 publication Critical patent/US6332797B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/521—Sealing between contact members and housing, e.g. sealing insert
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5205—Sealing means between cable and housing, e.g. grommet
    • H01R13/5208—Sealing means between cable and housing, e.g. grommet having at least two cable receiving openings

Definitions

  • the present invention relates to a waterproof connector structured such as to press a waterproof seal member attached to a rear end of a connector housing by a rear holder.
  • a waterproof connector structured such that these two functions are achieved by one waterproof seal member so as to reduce the number of parts and a time and labor for assembly is exemplified by a structure shown in FIGS. 1 and 2.
  • FIG. 4 is a perspective view of an outer appearance showing an assembled state of the waterproof connector in accordance with the embodiment of the present invention

Abstract

In a waterproof connector M in which a waterproof seal member 60 is held between a connector housing 30 and a rear holder 70, and an electric wire seal portion closely attached to an outer periphery of an electric wire so as to seal between the electric wire and the connector housing 30 and a connector seal portion 60B for sealing between both of the connector housings at a time of fitting to an opposing connector housing are integrally formed in the waterproof seal member 60, wherein the connector seal portion 60B is provided on an outer peripheral surface of the rear holder 70 in an exposed manner so as to be closely attached to an inner periphery of a hood portion of the opposing connector housing at a time of fitting the connector housing 30 to the opposing connector housing.

Description

BACKGROUND OF THE INVENTION
The present invention relates to a waterproof connector structured such as to press a waterproof seal member attached to a rear end of a connector housing by a rear holder.
A waterproof connector requires two functions comprising an electric wire seal function for sealing between an electric wire and a connector housing and a connector seal function for sealing between both connectors at a time of fitting a connector to an opposing connector.
In conventional, a waterproof connector structured such that these two functions are achieved by one waterproof seal member so as to reduce the number of parts and a time and labor for assembly is exemplified by a structure shown in FIGS. 1 and 2.
FIG. 1 shows an example of a waterproof connector 1 described in U.S. Pat. No. 5,197,898 and FIG. 2 shows an example of a waterproof connector 11 described in Japanese Unexamined Utility Model Publication No. 1-146478. Simultaneously explaining the both, these waterproof connectors 1 and 11 have male type connector housings 2 and 12, mat-shaped waterproof seal members 3 and 13 attached to rear ends thereof, and rear holders 4 and 14 attached to rear portions thereof and engaged with the connector housings 2 and 12 so as to press the waterproof seal members 3 and 13 to the connector housings 2 and 12. Hood portions 5 and 15 are attached to the rear holders 4 and 14, and lock mechanisms 6 and 16 for locking with female side connectors 10 and 20 are provided in the hood portions 5 and 15.
A plurality of terminals 7 and 17 are inserted to inner portions of the connector housings 2 and 12 from rear portions, and electric wires 8 and 18 connected to the respective terminals 7 and 17 extend rearward the waterproof connectors 1 and 11 through respective through holes 9 and 19 of the waterproof seal members 3 and 13. The mat-shaped main body portions having the through holes 9 and 19 correspond to electric wire seal portions 3A and 13A. In addition to the mat-shaped electric wire seal portions 3A and 13A, connector seal portions 3B and 13B for sealing gaps between both the connectors 1, 10, 11 and 20 at a time of fitting to the opposing female connectors 10 and 20 are integrally provided in the waterproof seal members 3 and 13. In the case of these waterproof connectors 1 and 11, the connector seal portions 3B and 13B are arranged within the hood portions 5 and 15.
In this case, as mentioned above, in the conventional waterproof connectors 1 and 11, since the connector seal portions 3B and 13B of the waterproof seal members 3 and 13 are protected by the hood portions 5 and 15, there is a problem that outer shapes of the waterproof connectors 1 and 11 are increased at a degree that the hood portions 5 and 15 are provided.
SUMMARY OF THE INVENTION
The present invention has been made by taking the matters mentioned above into consideration, and an object of the present invention is to provide a waterproof connector which intends to further reduce a size.
A first aspect of the invention provides a waterproof connector comprising: a connector housing having a terminal receiving chamber; a waterproof seal member attached to a rear end of the connector housing; a rear holder for pressing the waterproof seal member to the connector housing; an electric wire seal portion closely attached to an outer periphery of an electric wire extending rearward from a terminal inserted to the terminal receiving chamber so as to seal between the electric wire and the connector housing; a connector seal portion for sealing between both of the connector housings at a time of fitting the connector housing to an opposing connector housing; and the electric wire seal portion and the connector seal portion being integrally formed in the waterproof seal member, wherein the connector seal portion of the waterproof seal member is provided on an outer peripheral surface of at least one of the connector housing and the rear holder in an exposed manner so as to be closely attached to an inner periphery of a hood portion of the opposing connector housing at a time of fitting the connector housing to the opposing connector housing.
In accordance with the waterproof connector, since the connector seal portion of the waterproof seal member is provided on the outer peripheral surface of at least one of the connector housing and the rear holder in an exposed manner, it is possible to make an outer shape of the connector compact at a degree that the hood portion is omitted.
A second aspect of the invention provides a waterproof connector according to the first aspect, wherein the connector seal portion of the waterproof seal member is constituted by a thin outer peripheral wall fitted to an outer periphery of the rear holder, and the connector seal portion constituted by the thin outer peripheral wall is supported by an outer peripheral wall of the rear holder made of a material harder than the waterproof seal member from an inner side.
In accordance with the waterproof connector, since the connector seal portion is constituted by the thin outer peripheral wall and is supported by the hard rear holder from the inner side, it is easy to properly control an elasticity of the connector seal portion and there is not a risk that the connector seal portion is excessively deformed and the sealing property is deteriorated. Further, it is possible to prevent the sealing property from being reduced due to deterioration of the connector seal portion.
A third aspect of the invention provides a waterproof connector according to the first aspect or the second aspect, wherein an annular convex portion is provided on the outer peripheral surface of the connector seal portion so as to be continuous in a peripheral direction.
In accordance with the waterproof connector, since the annular convex portion is provided on the outer peripheral surface of the connector seal portion, it is possible to increase a close attaching property of the opposing connector with respect to the inner peripheral surface of the hood portion.
A fourth aspect of the invention provides a waterproof connector according to any one of the first to third aspects, wherein a lock arm engaging with an engaging portion of the inner periphery of the hood portion of the opposing connector housing at a time of fitting to the opposing connector housing is arranged at a front position of the connector seal portion in the connector housing in such a manner as to be retracted to the inner peripheral side from the connector seal portion.
In the conventional waterproof connector, the lock means with respect to the opposing connector is provided in the hood portion, however, in accordance with the waterproof connector of the present invention, there is no portion to be provided with the lock means because the hood portion is omitted. Then, the lock arm is arranged at the front position of the connector seal portion. Further, by arranging at the position retracted to the inner peripheral side from the connector seal portion, the structure is made such that the hood portion of the opposing connector can pass through the lock arm and reach the connector seal portion. Further, by arranging the lock arm in such a manner as to be retracted to the inner peripheral side from the connector seal portion as mentioned above, the waterproof connector can be made compact.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a cross-sectional view showing an embodiment of a conventional waterproof connector;
FIGS. 2A and 2B are views showing another embodiment of a conventional waterproof connector, in which FIG. 2A is a cross-sectional view taken along a horizontal surface and FIG. 2B is a cross-sectional view taken along a ling IIB—IIB in FIG. 2A;
FIG. 3 is an exploded perspective view of a waterproof connector in accordance with en embodiment of the present invention;
FIG. 4 is a perspective view of an outer appearance showing an assembled state of the waterproof connector in accordance with the embodiment of the present invention;
FIG. 5 is a cross-sectional view of an assembled state of the waterproof connector in accordance with the embodiment of the present invention; and
FIG. 6 is a cross-sectional view showing a fitting state between the waterproof connector in accordance with the embodiment of the present invention and an opposing connector.
DESCRIPTION OF THE PREFERRED EMBODIMENT
As shown in FIGS. 5 and 6, a waterproof connector M is provided with a hard synthetic resin male type connector housing 30 having a plurality of terminal receiving chambers 31, a female terminal 90 mounted to a front end of an electric wire W and inserted and set in each of the terminal receiving chambers 31 of the connector housing 30, a hard synthetic resin spacer 40 attached to a lower side of the connector housing 30 and engaging with the female terminal 90 received in each of the terminal receiving chambers 31, a hard synthetic resin front cover 50 attached to a front surface of the connector housing 30 from a lower side and guiding a connection of a male terminal 101 of a connector F in a female side to the female terminal 90, a thermoplastic elastomer resin mat-shaped waterproof seal member 60 having a plurality of electric wire inserting holes 61 corresponding to the respective terminal receiving chambers 31 and closely attached to a rear end surface of the connector housing 30, and a hard synthetic resin rear holder 70 for pressing the mat-shaped waterproof seal member 60 to the rear end surface of the connector housing 30. Further, in addition, there are provided a lock canceling pin (a canceling member) 81 for canceling the lock means at a time of being fitted to the connector F in the female side, a short-circuit terminal 82 for detecting a semi-fitting of the connector and the like.
A lock arm 32 mutually locking with an engaging portion 103 on an inner periphery of a hood portion 102 of a connector housing 100 in a female side at a time of being fitted to the connector F in the female side is provided in an upper surface portion of the connector housing 30. The lock arm 32 is supported in an overhung manner at a front end, and a free end thereof extends rearward along the upper surface of the connector housing 30.
The waterproof seal member 60 held between a rear wall surface of the connector housing 30 and the rear holder 70 integrally has a mat-shaped electric wire seal portion 60A for sealing a through portion of the electric wire W and a connector seal portion 60B for sealing a fitted portion between both of the connectors M and F. A plurality of electric wire through holes 61 are formed in the electric wire seal portion 60A and recess portions 62 are formed in a rear surface side while leaving a cylindrical thickness portion 61 a in the periphery of each of the electric wire inserting holes 61. Pressing convex portions 71 of the rear holder 70 are press inserted to these recess portions 62.
An outer peripheral portion of each of the recess portions 62 is defined by a thin outer peripheral wall having the same height as a protruding height of the cylindrical thickness portion 61 a, and the outer peripheral wall constitutes the connector seal 60A. The connector seal portion 60A corresponds to a portion attaching to the inner periphery of the hood portion 102 of the connector housing 100 in the female side so as to seal between both of the connectors M and F at a time of fitting to the connector F in the female side as shown in FIG. 6, and is exposed to the outer peripheral portion at the rear end of the waterproof connector M in a state of fitting to the outer periphery of the rear holder 70. Then, the connector seal portion 60B is set so as to be positioned in the outer peripheral side rather than the other portions of the waterproof connector M, and the lock arm 32 is retracted to the inner peripheral side from the connector seal portion 60B.
Further, annular convex portions 64 having a corrugated cross section and arranged in two stages in a direction of passing through the electric wire inserting hole 61 are provided on the inner peripheral surface of the electric wire inserting hole 61 surrounded by the cylindrical thickness portion 61 a in order to increase a sealing property with respect to the electric wire W. In the same manner, annular convex portions 65 having a corrugated cross section and arranged in two stages are provided on the outer peripheral surface of the connector seal portion 60B in order to increase a sealing property with respect to the connector housing 100 in the female side at a time of fitting to the connector F in the female side.
Then, the pressing convex portion 71 of the rear holder 70 is press inserted to the recess portion 62 of the waterproof seal member 60, thereby applying a pressing force to the waterproof seal member 60, increasing the sealing property of the cylindrical thickness portion 61 a with respect to the electric wire W, and pressing and supporting the connector seal portion 60B constituted by the thin outer peripheral wall from the inner side.
Next, a description will be given of an operation.
In the waterproof connector M, the connector seal portion 60B of the waterproof seal member 60 is exposed to the outer peripheral surface at the rear end of the waterproof connector M in a state of fitting to the outer peripheral surface of the rear holder 70. As mentioned above, by forcibly exposing the connector seal portion 60B outward so as to omit the hood portion, it is possible to make the outer shape of the waterproof connector M small. Further, the lock arm 32 a position for placing of which is lost due to the omission of the hood portion is arranged at the front position from the connector seal portion 60B in such a manner as to be retracted to the inner peripheral side from the connector seal portion 60B. Accordingly, it is possible to take the hood portion 102 of the opposing connector F to the connector seal portion 60B with passing through the lock arm 32 with no trouble. As mentioned above, since the lock arm 32 is arranged in such a manner as to be retracted to the inner peripheral side from the connector seal portion 60B, the waterproof connector M can be made compact.
Further, since the connector seal portion 60B constituted by the thin outer peripheral wall is backed up by the pressing convex portion 71 of the hard rear holder 70 from the inner side, it is possible to properly control a sealing property of the connector seal portion 60B by securing an accuracy of size of the rear holder 70, so that there is no case that the connector seal portion 60B is excessively deformed and the sealing property becomes unstable. Further, due to the back-up by the rear holder 70, it is possible to prevent the sealing property from being reduce due to the deformation of the connector seal portion 60B.
In this case, in the embodiment mentioned above, the structure is made such that the connector seal portion 60B of the waterproof seal member 60 is fitted to the outer periphery of the rear holder 70, however, the structure may be made such that it is fitted to the connector housing 30 side.

Claims (10)

What is claimed is:
1. A waterproof connector comprising:
a connector housing having a terminal receiving chamber;
a waterproof seal member attached to a rear end of said connector housing, said seal member comprising a mat-shaped portion having a front surface contact with the rear end of said connector housing and a rear surface, an electric wire seal portion forming at least one wire receiving hole extending through the mat-shaped portion, and a connector seal portion forming a thin outer peripheral wall around a periphery of the mat-shaped portion and extending from said rear surface of said mat-shaped portion of said seal member, said connector seal portion being configured to seal between two connector housings when said connector housing is fit to an opposing connector housing;
a rear holder for pressing said waterproof seal member to the connector housing; and
an electric wire extending rearward from a terminal inserted to said terminal receiving chamber, the electric wire seal portion closely attached to an outer periphery of the wire so as to seal between the electric wire and the connector housing;
wherein the connector seal portion of said waterproof seal member is provided on an outer peripheral surface of at least one of said connector housing and said rear holder in an exposed manner so as to be closely attached to an inner periphery of a hood portion of the opposing connector housing at a time of fitting said connector housing to the opposing connector housing.
2. A waterproof connector according to claim 1, wherein the thin outer peripheral wall is supported from inside by an outer peripheral wall of the rear holder made of a material harder than said waterproof seal member.
3. A waterproof connector according to claim 1, wherein an annular convex portion is provided on the outer peripheral surface of said connector seal portion so as to be continuous in a peripheral direction.
4. A waterproof connector according to claim 1, wherein a lock arm engaging with an engaging portion of the inner periphery of the hood portion of the opposing connector housing at a time of fitting to the opposing connector housing is arranged at a front position of said connector seal portion in said connector housing in such a manner as to be retracted to an inner peripheral side from said connector seal portion.
5. A waterproof connector according to claim 1, wherein the at least one wire receiving hole includes an inner annular convex portion.
6. A waterproof connector according to claim 1, wherein the electric wire seal portion includes a plurality of wire receiving holes.
7. A waterproof connector according to claim 1, wherein said waterproof seal member is elastomeric.
8. A waterproof connector according to claim 1, wherein said mat-shaped portion is flat.
9. A waterproof connector according to claim 1, wherein said seal member includes at least one recessed area between said at least one wire receiving hole and said outer peripheral wall.
10. A waterproof connector according to claim 9, wherein the at least one recessed portion of the seal member is configured to receive an outer peripheral wall of the rear holder.
US09/680,504 1999-10-13 2000-10-05 Waterproof connector Expired - Lifetime US6332797B1 (en)

Applications Claiming Priority (2)

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JP11-291113 1999-10-13
JP29111399A JP2001110504A (en) 1999-10-13 1999-10-13 Waterproof connector

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6752659B2 (en) * 2001-02-22 2004-06-22 Yazaki Corporation Waterproof connector
US20120088389A1 (en) * 2010-10-08 2012-04-12 Sumitomo Wiring Systems, Ltd. Connector
CN102570143A (en) * 2010-10-08 2012-07-11 住友电装株式会社 Connector
US20140377978A1 (en) * 2011-06-02 2014-12-25 Yazaki Corporation Connector
US9985381B2 (en) * 2016-03-17 2018-05-29 Te Connectivity Germany Gmbh Waterproof electrical connector having a seal movable to cover a seal and having a cable recess
US10276966B1 (en) * 2017-12-04 2019-04-30 Te Connectivity Corporation Electrical connector with alignment plate and seal

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4609284B2 (en) * 2005-11-18 2011-01-12 住友電装株式会社 Split connector
DE102016101762A1 (en) * 2016-02-02 2017-08-03 Küster Holding GmbH Housing for electrical connectors

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01146478U (en) 1988-03-31 1989-10-09
US4940421A (en) * 1988-07-19 1990-07-10 Molex Incorporated Water-proof electrical connector
US4973268A (en) * 1989-10-10 1990-11-27 Amp Incorporated Multi-contact electrical connector with secondary lock
US4978314A (en) * 1988-11-24 1990-12-18 Yazaki Corporation Waterproof press-connecting connector
US5197898A (en) 1991-06-28 1993-03-30 Amp Incorporated Multi-contact electrical connector with one-piece seal
US5618206A (en) * 1994-10-24 1997-04-08 Yazaki Corporation Waterproof connector having a connector housing with a plurality of terminal accommodation chambers and a seal hood
US5671311A (en) * 1994-11-15 1997-09-23 The Whitaker Corporation Sealed multiposition fiber optic connector
US5879201A (en) * 1996-07-31 1999-03-09 Sumitomo Wiring Systems, Ltd. Connector
US6053754A (en) * 1997-11-26 2000-04-25 Honda Giken Kogyo Kabushiki Kaisha Waterproof connector
US6152752A (en) * 1998-10-20 2000-11-28 Yazaki Corporation Waterproof connector and method for assembling same

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01146478U (en) 1988-03-31 1989-10-09
US4940421A (en) * 1988-07-19 1990-07-10 Molex Incorporated Water-proof electrical connector
US4978314A (en) * 1988-11-24 1990-12-18 Yazaki Corporation Waterproof press-connecting connector
US4973268A (en) * 1989-10-10 1990-11-27 Amp Incorporated Multi-contact electrical connector with secondary lock
US5197898A (en) 1991-06-28 1993-03-30 Amp Incorporated Multi-contact electrical connector with one-piece seal
US5618206A (en) * 1994-10-24 1997-04-08 Yazaki Corporation Waterproof connector having a connector housing with a plurality of terminal accommodation chambers and a seal hood
US5671311A (en) * 1994-11-15 1997-09-23 The Whitaker Corporation Sealed multiposition fiber optic connector
US5879201A (en) * 1996-07-31 1999-03-09 Sumitomo Wiring Systems, Ltd. Connector
US6053754A (en) * 1997-11-26 2000-04-25 Honda Giken Kogyo Kabushiki Kaisha Waterproof connector
US6152752A (en) * 1998-10-20 2000-11-28 Yazaki Corporation Waterproof connector and method for assembling same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6752659B2 (en) * 2001-02-22 2004-06-22 Yazaki Corporation Waterproof connector
US20120088389A1 (en) * 2010-10-08 2012-04-12 Sumitomo Wiring Systems, Ltd. Connector
CN102570143A (en) * 2010-10-08 2012-07-11 住友电装株式会社 Connector
US8366472B2 (en) * 2010-10-08 2013-02-05 Sumitomo Wiring Systems, Ltd. Connector
CN102570143B (en) * 2010-10-08 2015-06-03 住友电装株式会社 Connector
US20140377978A1 (en) * 2011-06-02 2014-12-25 Yazaki Corporation Connector
US9225103B2 (en) * 2011-06-02 2015-12-29 Yazaki Corporation Connector
US9985381B2 (en) * 2016-03-17 2018-05-29 Te Connectivity Germany Gmbh Waterproof electrical connector having a seal movable to cover a seal and having a cable recess
US10276966B1 (en) * 2017-12-04 2019-04-30 Te Connectivity Corporation Electrical connector with alignment plate and seal

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Publication number Publication date
DE10050738A1 (en) 2001-05-31
JP2001110504A (en) 2001-04-20
DE10050738B4 (en) 2004-04-22

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